studies on marine Ostracods 



(573 



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Shell: — Length: According to C. Claus, 1,5 — 1,8 mm. (no difierence in this character 

 between male and female is given). The male investigated by me was 1,75 mm. long. Length: 

 lieight about 2,2 : 1; length : breadth about 2,3 : 1. S e e n f r o m t h e s i d e it is of about 

 the type reproduced by C. Cl.ALS; the posterior margin of the shell is perhaps not quite so straight. 

 Seen from below it is of about the type described and reproduced above for C. Haddoni; 

 the anterior jaart perhaps does not 

 dominate quite so much over the 

 posterior part as in the figui'e of 

 the species mentioned. In other 

 respects it resembles C. Haddoni. 



First antenna: — This 

 is of the same type as in (J. Haddoni 

 except that the e-bristle is furnish- 

 ed with only about 30 — 32 spines 

 in each row; there are sparse short 

 secondary bristles on the anterior 

 side of this bristle. 



Second antenna: — 

 This is of quite the same type as is 

 described and reproduced above for 

 (J. Haddoni; the clasping organ on 

 the left endopodite was perhaps 

 somewhat more rounded proximally 

 in the specimen investigated by 

 me than in my fig. 5 of the species 

 just mentioned. 



Mandible: — Of the 

 same type as in C. Haddoni, but 



the number of teeth on the distal tooth-list is somewhat less (about the same as in my fig. 17 

 of C. symmetrica). The proximal tooth-list varies somewhat in type. 



The maxilla, the fifth, sixth and seventh limbs, the furca, the 

 rod-shaped organ and the upper lip are of the same type as in C. Haddoni. 



The penis on the specimen investigated by me agreed well with the one reproduced 

 by C. Claus, 1891 a, pi. V, fig. 4 (consecjuently also with this organ in C'. Haddoni; the copidatory 

 appendage is, however, not toothed at the edge as in my fig. 6 of the species in question). 



V e male: — 



Shell: — Length: The specimens investigated by me measured 1,6—1,95 mm. 

 Length : height about 2,2 : 1; length : breadth about 2,5 : 1. Seen from the side 

 (fig. 1) it is of the same type as that of the male, but the shoulder vault is somewhat less 

 developed. S e e n f r o m b e 1 o w (fig. 2) it is about the same as in C. Haddoni. In other 

 respects it is like that of the male. 



Zooloi;. biilras;. Upps:ila. SiipiO.-lid. I. 



Fig. GXXVIII. — Conchoecia bispinosa C. Glaus. — 1. Shell seen from 

 the side, ?; 50 X. 2. Shell seen from below, ?; 42 X. 3. Pad on the 

 b-bristle of the first antenna, <J; 1200 X. 4. Distal part of the rod- 

 shaped organ and the first antenna, $; 187 X. (Fig. 3 from a speci- 

 nu'n from station 6 b, the other figures are from specimens from 



station 20 b.) 



